/*
 * Copyright (c) 2019, NVIDIA CORPORATION.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

class AsyncEvent {
 public:
  AsyncEvent() : async_event(NULL) {}
  AsyncEvent(int size) : async_event(NULL) { cudaEventCreate(&async_event); }
  ~AsyncEvent()
  {
    if (async_event != NULL) cudaEventDestroy(async_event);
  }

  void create() { cudaEventCreate(&async_event); }
  void record(cudaStream_t s = 0)
  {
    if (async_event == NULL) {
      cudaEventCreate(&async_event);  // check if we haven't created the event yet
    }

    cudaEventRecord(async_event, s);
  }
  void sync() { cudaEventSynchronize(async_event); }

 private:
  cudaEvent_t async_event;
};
